The Correlation between Halo Mass and Stellar Mass for the Most Massive Galaxies in the Universe

Jeremy L. Tinker, Joel R. Brownstein, Hong Guo, Alexie Leauthaud, Claudia Maraston, Karen Masters, Antonio D. Montero-Dorta, Daniel Thomas, Rita Tojeiro, Benjamin Weiner, Idit Zehavi, Matthew D. Olmstead

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

We present measurements of the clustering of galaxies as a function of their stellar mass in the Baryon Oscillation Spectroscopic Survey. We compare the clustering of samples using 12 different methods for estimating stellar mass, isolating the method that has the smallest scatter at fixed halo mass. In this test, the stellar mass estimate with the smallest errors yields the highest amplitude of clustering at fixed number density. We find that the PCA stellar masses of Chen et al. clearly have the tightest correlation with halo mass. The PCA masses use the full galaxy spectrum, differentiating them from other estimates that only use optical photometric information. Using the PCA masses, we measure the large-scale bias as a function of M∗ for galaxies with log M∗ ≥ 11.4, correcting for incompleteness at the low-mass end of our measurements. Using the abundance matching ansatz to connect dark matter halo mass to stellar mass, we construct theoretical models of b (M∗) that match the same stellar mass function but have different amounts of scatter in stellar mass at fixed halo mass, slog M∗. Using this approach, we find σlog M ∗ 0.18 -0.02 +0.01=. This value includes both intrinsic scatter as well as random errors in the stellar masses. To partially remove the latter, we use repeated spectra to estimate statistical errors on the stellar masses, yielding an upper limit to the intrinsic scatter of 0.16 dex.

Original languageEnglish (US)
Article number121
JournalAstrophysical Journal
Volume839
Issue number2
DOIs
StatePublished - Apr 20 2017

Keywords

  • cosmology: observations
  • galaxies: abundances
  • galaxies: evolution
  • galaxies: halos
  • galaxies: luminosity function, mass function

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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